Wasps

Question

Can wasps destroy trees?

Answer 1

There are some wasp species that lay their eggs in trees and cause galls (basically plant tumors) to form, but this is not usually fatal to the tree:

http://ento.psu.edu/extension/factsheets/galls-oak

Other than that, carpenter bees can damage trees, though they are more likely to attack houses or other wooden structures:

https://www.gardeningknowhow.com/plant-problems/pests/insects/carpenter-bee-control.htm